Pipe-bending machine.



PATENTED JAN. 30, 1906.

J. H. MULL. PIPE BENDING MACHINE.

APP

LICATION FILED APB. 22, 1905.

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UNITED STATES PATENT OEEIOE'.

JAMES HENRY MULL, OE PHILADELPHIA, PENNSYLVANIA, ASSIGNOE To CHICAGO PNEUMATIC TOOL COMPANY, OE CHICAGO, ILLINOIS, A COR- PORATION OF NEW JERSEY.

PIPE-BENDIYNG MACHINE.

Specification of Letters Patent.

To all whom it may concern,.-

Be it known that I, J AMES HENRY MULL, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Pipe-Rendimr Machine, of which the following is a specication.,

y invention consists of a novel construction cfa pipe-bending machine which can be cheaply manufactured, is powerful and eicient in its operation and not liable to easily get out of order, and wherein different sizes of pipe or other material can be readily and expeditiously bent'or coiled without requir-v ing the services of skilled labor.

`It also consists of a'novel construction of an adjustable plate which can be readily adjusted' and locked in any desired position for the purpose of bending different sizes of ipe or of bending the pipe or other material Into different curvatures.

It further consists of a novel construction of slidingabutment which is adjustably mounted in the grooved adjustable plate, whereby the machine can be quickly adapted to bend pipe ofvarious sizes into the desired curvatures. l

It further consists of novel means carried by a sliding abutment whereby different sizesV of pipe can be bent into different curvatures without the liability of flattening the pipe during the act of bending.

It further consists of a novel construction of adjustable or interchangeable bending-dies which are readily shifted into operative posi tion, whereby different sizes of pipe may be bent into different curvatures, according to requirements.

It further consists of other novel features,

all as will be hereinafter fully set forth, and

pointed out in the claims, j

Figure 1 represents a side elevation of a pipe-bending machine embodying my invention. Fig. 1. line a; Fig. 1. section on line y y, Fig. 1, certain of the parts being omitted for the sake of clearness of illustration. Fig. 5 represents a erspective View of the sliding abutment and) detached position.

Fig. 2 represents a top plan view .of Fig. 3 represents a partial section on Fig. 4 represents a partial' its adjuncts in Similar'numerals of reference indicate corres onding parts in the figures.

1 eferring to the drawings, 1 designates my novel pipe-bending machine, the same comrising t e post or standard 2 having the colar 3 thereon, above which extends thc upper portion 4, which serves asa support for the block .or carrier 5, which is held in position by means of the cap 6, which is secured to the carrier by the bolts or other fastening devices 7.

8 designates a pinion which is mounted on the bearing or stud 9, which is provided with the flange 10, which is secured to the carrier by means of the bolts 11 orother fastening devices, said pinion meshing with the quadrant-gear 12, which is mounted on the shaft 13, which rotates in the bearing 14, mounted on the carrier 5. The outer extremity of the shaft 13 has mounted thereon a plurality of bending-dies 15, 16, and 17, which are shown as successively inclosed, are preferably ,quadrant-shaped, aswill be understood from Fig. 1, and are provided with the grooves 18 for the reception therein ofthe pipe to be bent. 4

19 designates a keeper which is adapted to.

be secured to a suit-able portion of the eriphery of the bending-dies by means of the bolt 2() or other suitable fastening device, the oi iice of Said keeper being to secure temporarily i-n position the end of the pipe which is being bent. In order to enable the desired form of bending-die 15, 16, or 17 to be readily employed or rendered inoperative at will, I einploy the key or spline 21, which is adapted to' engage a keyway common to the shaft 13 and each of the bending-dies, it being apparent that when the key 21 is driven into its extreme position only the inner or larger bending-die 17 can be used. When it isdesiredto render, for example, the larger bending-die 17 inoperative, the key 21 is withdrawn to Patented Jan. 30, 1906.

the point indicated inF ig. 4, whereupon the larger die 17 vcan drop into the position indicated in dotted lines and the die 16 is then in operative position. Similarly, to render the die 15 operative the key 2l is withdrawn sufficiently to permit the dies 17 and 16 to drop to their lowest position, whereupon the die 15, becomes operative, it being understood that each of the bending-dies are held in the desired position by means of set-screws or other similar devices and that the downward movement of said bending device may be limited by means o'f a suitable stop, as 22 or its equivalent.

In order to dispense with the apertured plate heretofore employed in devices of this general character and to render the machine more easily adjusted to different sizes and varieties of pipe, I employ the rotatable adjustable face-plate 23, having in its outer portion the longitudinally-extending ways or groovev 24, said plate being swiveled or mountedupon the in 25 as` an axis and being guided and loc ed in position by means of the engagement of the head 26 of the bolt 27, which passes through the curved groove or ways 28 in the carrier 5.

29 designates a sliding abutment, consistin ofa plate having passedtherethrough the bt 30, thehead 31 of which slides in the groove or ways 24, while the nut 32 can be tightened or loosened so as to lock the sliding abutment 29 in the desired position, according to requirements. l

33 designates a roller mounted on the stem 34, which terminates in the head 35, which also travels in the ways 24.

36 designates the guide-pin, which passes through the abutment 29 and has the head 37, which also travels in the ways 24.

38 designates the hand-wheel, by which the machine is operated according to requirements, the hub 39 of said hand-wheel being keyed, pinned, or otherwise secured to the pinion 8, so that said hand-wheel and pinion rotate in unison.

4() designates the section of pipe or tubing in the act ofbeing bent, the extremity 41 of said tubing being 'held in position by the keeper 19.

The operation is as follows: To bend a section of pipe or tubing, as 40, the end 41 of the same is held in position by the keeper 19. The straight or unbent portion of the pipe is in Contact with the under side of the roller 33, and the operator having turned the handwheel 38, the pinion 8, and the quadrant-gear 12 in the proper direction, as indicated by the arrow 0 the parts will assume the position seen in Fig. 1. Upon loosening the keeper 19 the pipe can be readily removed, and in practice I find that the quadrant-gear l2, by

reason of the position the parts assume, as in Fig. 1, when the act of bending is completed, will, without attention from the operator, turn toward the left, so as to automatically drop into operative position.

'It will be evident that the hand-wheel 38, the pinion 8, the quadrant-gear 12, the shaft 13, and the bending-die l5, 16, or 17, as the case may be, will operate in unison. Upon loosening the nut 32 the abutment carrying the pin 36 and the` roller 33 can be shifted along the ways 24 of the plate 23, so as torad- 65 ing-die which may be employed. By loosening the bolt 27 the plate 23 can be rocked on its vaxis 25, so as to carry the sliding abut-V ment into the desired position.

By the employment of the vdifferent-sized dies and my novel means for rendering the desired one of the same operative or inopera-` tive I am enabled to adapt the machine to a wide variety of uses, as is evident.

It will be apparent that my novel machine, while being of a very simple character, can accomplish a great variety of work and only requires the services of an ordinary helper who can, without instruction, by the aid of the machine bend pipe or tubing to anyl desired complex curvature in a very sho'rt time. -The machine being light in weight is readily carried from shop to job, or Vvice versa, and can be secured to any column, stanchion, or any available support in aA few minutes, or a suitable stand can be employed, as shown. iron, brass, copper, or other materials up to two inches in diameter can be bent cold without any attening of the pipe during-bending. It is also well adapted for the use of special dies that can be readily attached for bending light angles, iiats, or T-bars to any desired radius as easily as bending pipe, and one` operator can, without assistance, bend a piece of two-inch pipe to an S bend in three minutes.

It will be apparent that changes may be made by those skilled in the art, which will come within the spirit of my invention, and I do not, therefore, desire to be limited in every instance to the exact construction herein shown and described. y

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a bending-machine, a bending-die, a support therefor, an angularly-adjustable rotatable face-plate having ways therein extending upon opposite sides of the axis of the face-platea sliding abutment mounted in said ways and means for actuating said die.

2. In a bending-machine, a bending-die, asupport therefor, 4an angularly-adjustable ro-l tatableplate having ways therein extending u on opposite sides of the axis of the facep ate, a sliding abutment mounted in said ways, a carrier for supporting said die and plate,*and means for locking said plate with respect to said carrier.

3. In a bending-machine, a bending-die, a support therefor, an angularly-adjustable rotatable plate having ways therein extending u on opposite sides of the axis of the facep ate, a sliding abutment mounted in said ways, a carrier for supporting said die and I have found that piping of steel,

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plate, and means for locking said plate with respect to said carrier, in combination with means for actuatingsaid die.

4. In a bending-machine, a bending-die, a support therefor, an adjustable plate having Ways therein, a slidin abutment mounted in said ways, a carrier or supporting said die and plate, a curved groove in said carrier, and loloking devices common to said groove, and

ate. p 5. In a bending-machine, a bending-die, a carrier, a support therefor, an adjustable plate having a longitudinally extending groove or Ways therein, a sliding abutment su orted in said groove, means for locking sai abutment in osition, a curved groove in said carrier, and ocking devices common to said groove and plate.

6. In a bending-machine, a carrier, means for supporting said carrier, a shaft mounted in suitable bearings, a quadrant-gear mounted on said shaft, a bending-die mounted on said shaft, a rotatable plate supported by said carrier, means common to said carrier and plate for locking said plate in the desired position and a sliding abutment carried by said plate and movable to opposite sides of the axis of the plate.

7. In a bending-machine, a standard, a carrier mounted thereon, a shaft having bearings in said carrier, a plurality of independentlymovable bending-dies carried by said shaft at the same time, and means for maintaining any of said dies in operative relation with said shaft at will.

8. Ina bending-machine, a support, a shaft therein,a lurality of inde endently-movable bending ies on said sha t at the same time and angularly movable to operative or inoperative positions, and means for maintaining any of said dies in operative position.

9. In abendinU-machine, a support, a shaft therein, a plurality of independently-movable bending-dies of dierent diameters on said shaft at the same time, and means for maintaining operative connection of any of said dies with said shaft in substantially the same bending-plane. ,t

10. In a bending-machine, a support, a shaft therein, a lurality of successively-inclosed bending-dies upon said shaft at the same time, and angularly movable with re-y spect to it, and means for maintaining any of said dies in operative angular relation to said shaft at will.

11. In a bending-machine, a bending-die, a shaft on which said die is mounted, a quadrant-gear mounted on said shaft, a plnlon meshing with said quadrant-gear, a handwheel whereby said pinion and gear maybe rotated in unison, an angularly-adjustable faceplate and a sliding abutment mounted on said face-plate.

12. In a bending-machine, a bending-die, a shaft on which said die is mounted, a quadrant-gear mounted on said shaft, a pinion meshing with said quadrant-gear, a handwheel whereby said pinion and gear may be rotated in unison, an angularly-adjustable face -plate having ways therein, a sliding abutment mounted in said ways,.means for locking said face-plate in position, and means for locking said abutment in position.

JAMES HENRY MULL.

Witnesses:

E. HAYWARD FAraBANKs, Trios. MCFARLAND. 

